WO2013042080A1 - Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion - Google Patents
Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion Download PDFInfo
- Publication number
- WO2013042080A1 WO2013042080A1 PCT/IB2012/055030 IB2012055030W WO2013042080A1 WO 2013042080 A1 WO2013042080 A1 WO 2013042080A1 IB 2012055030 W IB2012055030 W IB 2012055030W WO 2013042080 A1 WO2013042080 A1 WO 2013042080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- platinum
- oxidation catalyst
- diesel oxidation
- palladium
- Prior art date
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title claims abstract description 275
- 229910052763 palladium Inorganic materials 0.000 title claims abstract description 117
- 230000003647 oxidation Effects 0.000 title claims abstract description 111
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 111
- 239000003054 catalyst Substances 0.000 title claims abstract description 108
- 239000000463 material Substances 0.000 title claims abstract description 107
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 title claims abstract description 41
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 title description 38
- 239000000203 mixture Substances 0.000 title description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 284
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 124
- 239000000758 substrate Substances 0.000 claims abstract description 53
- 230000003197 catalytic effect Effects 0.000 claims abstract description 22
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 15
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 67
- 239000010457 zeolite Substances 0.000 claims description 45
- 229930195733 hydrocarbon Natural products 0.000 claims description 43
- 150000002430 hydrocarbons Chemical class 0.000 claims description 43
- 229910021536 Zeolite Inorganic materials 0.000 claims description 36
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 36
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- -1 Pr6On Inorganic materials 0.000 claims description 15
- 239000004215 Carbon black (E152) Substances 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 239000004071 soot Substances 0.000 claims description 10
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910052845 zircon Inorganic materials 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000006722 reduction reaction Methods 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 claims description 6
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 5
- 229910052878 cordierite Inorganic materials 0.000 claims description 5
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 229910052642 spodumene Inorganic materials 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 claims description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 3
- 235000019792 magnesium silicate Nutrition 0.000 claims description 3
- 229910052670 petalite Inorganic materials 0.000 claims description 3
- 229910052851 sillimanite Inorganic materials 0.000 claims description 3
- 239000002002 slurry Substances 0.000 description 32
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 30
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 29
- 239000002245 particle Substances 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 206010021198 ichthyosis Diseases 0.000 description 9
- 239000007864 aqueous solution Substances 0.000 description 8
- 239000010970 precious metal Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000001354 calcination Methods 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- GHOKWGTUZJEAQD-ZETCQYMHSA-N (D)-(+)-Pantothenic acid Chemical compound OCC(C)(C)[C@@H](O)C(=O)NCCC(O)=O GHOKWGTUZJEAQD-ZETCQYMHSA-N 0.000 description 1
- 241000269350 Anura Species 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GMTXBUZKCHNBCH-UHFFFAOYSA-L [K].[Pt](Cl)Cl Chemical compound [K].[Pt](Cl)Cl GMTXBUZKCHNBCH-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- FGEWSWBUAUZSTE-UHFFFAOYSA-L azane platinum(2+) dithiocyanate Chemical compound N.[Pt+2].[S-]C#N.[S-]C#N FGEWSWBUAUZSTE-UHFFFAOYSA-L 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- UNYSKUBLZGJSLV-UHFFFAOYSA-L calcium;1,3,5,2,4,6$l^{2}-trioxadisilaluminane 2,4-dioxide;dihydroxide;hexahydrate Chemical compound O.O.O.O.O.O.[OH-].[OH-].[Ca+2].O=[Si]1O[Al]O[Si](=O)O1.O=[Si]1O[Al]O[Si](=O)O1 UNYSKUBLZGJSLV-UHFFFAOYSA-L 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910052676 chabazite Inorganic materials 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 229910001603 clinoptilolite Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000012013 faujasite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 229910052680 mordenite Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- NFOHLBHARAZXFQ-UHFFFAOYSA-L platinum(2+);dihydroxide Chemical compound O[Pt]O NFOHLBHARAZXFQ-UHFFFAOYSA-L 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/064—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
- B01J29/068—Noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/7007—Zeolite Beta
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/7049—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
- B01J29/7057—Zeolite Beta
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/74—Noble metals
- B01J29/7415—Zeolite Beta
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/19—Catalysts containing parts with different compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0027—Powdering
- B01J37/0036—Grinding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0244—Coatings comprising several layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0246—Coatings comprising a zeolite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1023—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2061—Yttrium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2063—Lanthanum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2066—Praseodymium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20715—Zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/902—Multilayered catalyst
- B01D2255/9025—Three layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/912—HC-storage component incorporated in the catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/42—Addition of matrix or binder particles
Definitions
- the present invention relates to a layered oxidation catalyst, in particular for the treatment of diesel engine exhaust, containing ceria as palladium support material.
- lean burn engines e.g. diesel engines and lean burn gasoline engines
- Diesel engines in particular, also offer significant advantages over gasoline engines in terms of their fuel economy, durability, and their ability to generate high torque at low speed. From the standpoint of emissions, however, diesel engines present problems more severe than their spark-ignition counterparts. Emission problems relate to particulate matter (PM), nitrogen oxides (NOx), unburned hydrocarbons (HC) and carbon monoxide (CO).
- NOx is a term used to describe various chemical species of nitrogen oxides, including nitrogen monoxide (NO) and nitrogen dioxide (NO2), among others.
- Oxidation catalysts comprising precious metals such as platinum group metals (PGM) dispersed on a refractory metal oxide support are known for use in treating the exhaust of diesel engines in order to convert both hydrocarbon and carbon monoxide gaseous pollutants by catalyzing the oxidation of these pollutants to carbon dioxide and water.
- PGM platinum group metals
- Such catalysts have been generally contained in units called diesel oxidation catalysts (DOC), or more simply catalytic converters, which are placed in the exhaust flow path from a diesel powered engine to treat the exhaust before it vents to the atmosphere.
- DOC diesel oxidation catalysts
- the diesel oxidation catalysts are formed on ceramic or metallic substrate carriers upon which one or more catalyst coating compositions are deposited.
- oxidation catalysts containing platinum group metals dispersed on a refractory oxide support promote the oxidation of nitric oxide (NO) to nitric dioxide (NO2).
- NO nitric oxide
- NO2 nitric dioxide
- catalysts used to treat the exhaust of internal combustion engines are less effective during periods of relatively low temperature operation, such as the initial cold-start period of engine operation, because the engine exhaust is not at a temperature sufficiently high for efficient catalytic conversion of noxious components in the exhaust.
- an adsorbent material which may be a zeolite, as part of a catalytic treatment system in order to adsorb gaseous pollutants, usually hydrocarbons, and retain them during the initial cold-start period.
- adsorbent material usually a zeolite
- hydrocarbons usually hydrocarbons
- US 5,125,231 discloses the use of platinum group metal-doped zeolites as low temperature hydrocarbon adsorbents as well as oxidation catalysts.
- oxidation catalysts comprising a platinum group metal (PGM) dispersed on a refractory metal oxide support are known for use in treating exhaust gas emissions from diesel engines.
- Platinum (Pt) remains the most effective platinum group metal for oxidizing CO and HC in a DOC, after high temperature aging under lean conditions and in the presence of fuel sulfur.
- Pd palladium
- Pd based DOCs typically show higher light-off temperatures for oxidation of CO and HC, especially when used with HC storage materials, potentially causing a delay in HC and or CO light-off.
- Pd containing DOCs may poison the activity of Pt to convert paraffins and/or oxidize NO and may also make the catalyst more susceptible to sulfur poisoning. These characteristics have typically prevented the use of Pd as an oxidation catalyst in lean burn operations especially for light duty diesel applications where engine temperatures remain below 250 °C for most driving conditions. As emissions regulations become more stringent, there is a continuing goal to develop diesel oxidation catalyst (DOC) systems that provide improved performance, for example, light-off performance.
- DOC diesel oxidation catalyst
- WO2010/133309 discloses Pd enriched diesel oxidation catalysts and their application as catalysts for the oxidation of CO and HC emissions from a compression ignition/diesel engine.
- WO2010/083313 discloses a diesel oxidation catalyst comprising at least two, specifically three distinct layers, at least one of which contains an oxygen storage compound (OSC) that is present in a layer separate from the majority of the platinum group metal (PGM) components, such as palladium and platinum.
- OSC oxygen storage compound
- PGM platinum group metal
- US 2008/045405 discloses a diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons and carbon monoxide, and the reduction of nitrogen oxides. More particularly, US 2008/045405 is directed to a washcoat composition comprising two distinct washcoat layers containing two distinctly different weight ratios of Pt:Pd.
- these prior art DOCs still show unsatisfactory breakthrough of HC and CO. Further, hydrocarbon storage capacity of these prior art DOCs is enhanced at the expense of the catalytic activity of the catalyst.
- the present invention is directed to a diesel oxidation catalyst with a layered structure in order to maximize the hydrocarbon storage capacity without sacrificing the catalytic activity of the catalyst. Additionally, it was an object of the present invention to provide a DOC which continually supports the oxidation and abatement of CO and unburned HC and thus allows for a minimum breakthrough of HC and CO. Finally, it was an object of the present invention to provide a DOC which, due to the rarity and consequently costs of precious metal components usually used for the preparation of DOCs, contains a reduced amount of platinum in the catalyst composition allowing for reduced costs for the DOC without reducing the catalytic efficiency. There is also a goal to utilize other components of DOCs, for example the zeolites, ceria, and palladium, as efficiently as possible.
- a layered diesel oxidation catalyst comprising:
- platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer
- a third layer on the second layer, the third layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum;
- platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- a system for treating a gaseous exhaust stream of a diesel engine comprising:
- an exhaust conduit in fluid communication with the diesel engine via an exhaust manifold, the layered diesel oxidation catalyst as defined above, wherein the carrier substrate is a wall- flow substrate or a flow through substrate, and one or more of the following in fluid communication with the layered diesel oxidation catalyst composite: a catalyzed soot filter (CSF), a selective catalytic reduction (SCR) article, a NOx storage and reduction (NSR) catalytic article.
- CSF catalyzed soot filter
- SCR selective catalytic reduction
- NSR NOx storage and reduction
- Figure 1 shows CO light-off curves obtained from the treatment of diesel exhaust using the DOCs according to Samples A), B), C), D) and E).
- the x-axis of the diagram denoted "Catalyst Inlet T / °C” shows the respective catalyst inlet temperature in °C and ranges from 120 °C to 280 °C, whereas the y-axis denoted "CO-Eff / %” shows the corresponding efficacy of CO oxidation to CO2 in % and ranges from 0 % to 100 %.
- the values for Sample A) according to the invention are displayed in a solid line with bullets, the values for Sample B) according to the invention are displayed in a dotted line, the values for Sample C) according to the invention are displayed in a dashed line, the values for Sample D) not according to the invention are displayed in a solid line, and the values for Sample E) not according to the invention are displayed in a solid line with crosses.
- Figure 2 shows HC light-off curves obtained from the treatment of diesel exhaust using the DOCs according to Samples A), B), C), D) and E).
- the x-axis of the diagram denoted "Catalyst Inlet T / °C” shows the respective catalyst inlet temperature in °C and ranges from 120 °C to 280 °C, whereas the y-axis denoted "HC-Eff / %" shows the corresponding efficacy of HC oxidation to CO2 in % and ranges from 0 % to 100 %.
- the values for Sample A) according to the invention are displayed in a solid line with bullets, the values for Sample B) according to the invention are displayed in a dotted line, the values for Sample C) according to the invention are displayed in a dashed line, the values for Sample D) not according to the invention are displayed in a solid line, and the values for Sample E) not according to the invention are displayed in a solid line with crosses.
- Figure 3 shows HC and CO light-off temperatures at 50 % conversion (CO) and 70 % conversion (HC) obtained from the treatment of diesel exhaust using the DOCs according to Samples A), B), C), D) and E).
- the x-axis of the diagram shows the respective Samples A) to E), whereas the y-axis denoted "CO Light-off @ 50 % Conversion / °C" and " HC Light-off @ 70 % Conversion / °C” shows the corresponding temperatures at which 50 % of CO are oxidized to CO2 and at which 70 % of HC are oxidized to CO2, respectively, and ranges from 100 °C to 260 °C.
- the values for CO conversion are displayed as checkered bars, and the values for HC conversion are displayed as dashed bars.
- the present invention relates to a layered diesel oxidation catalyst (DOC) comprising: a) a carrier substrate;
- platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the platinum to palladium weight ratio of the first layer is concerned provided that the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the platinum to palladium weight ratio of the first layer is in the range of from 0:1 to 1 .1 :1 .
- the present invention also relates to the diesel oxidation catalyst as defined above, wherein the platinum to palladium weight ratio of the first layer is in the range of from 0:1 to 1.1 :1 .
- the platinum to palladium weight ratio of the second layer is concerned provided that the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the platinum to palladium weight ratio of the second layer is in the range of from 1 :0 to 1.1 :1 , more preferably in the range of from 10:1 to 1 .5:1 , even more preferably in the range of from 5:1 to 2:1 , most preferably in a ratio of 2:1 , provided that the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the present invention also relates to the diesel oxidation catalyst as defined above, wherein the platinum to palladium weight ratio of the second layer is in the range of from 1 :0 to 1.1 :1 , preferably in the range of from 10:1 to 1 .5:1 , more preferably in the range of from 5:1 to 2:1 , most preferably in a ratio of 2:1.
- the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the ratio of the platinum to palladium weight ratio of the first layer to the platinum to palladium weight ratio of the second layer is lower than or equal to 0.9.
- the present invention also relates to the diesel oxidation catalyst as defined above, wherein the ratio of the platinum to palladium weight ratio of the first layer to the platinum to palladium weight ratio of the second layer is lower than or equal to 0.9.
- the first layer comprises palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material.
- the support material of the first layer comprises ceria in an amount of at least 65 weight-%, more preferably at least 85 weight-%, even more preferably at least 95 weight-%, most preferably 100 weight-% based on the total weight of the support material.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the first layer comprises ceria in an amount of at least 65 weight-%, preferably at least 85 weight-%, more preferably at least 95 weight-%, most preferably 100 weight-% based on the total weight of the support material.
- the support material of the first layer further comprises zirconia and/or alumina.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the first layer further comprises zirconia and/or alumina.
- the support material of the first layer further comprises a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the first layer further comprises a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- the support material of the first layer comprises a ceria-zirconia material consisting of Ce0 2 : 45 wt%, Zr0 2 : 43.5 wt%, La 2 0 3 : 8 wt%, Pr 6 On: 2 wt%, and Hf0 2 : 1 .5 wt%.
- the support material of the second layer may comprise a metal oxide.
- the support material of the second layer comprises a metal oxide selected from the group consisting of alumina, zirconia, silica, titania, silica-alumina, alumina- zirconia, titania-silica, titania-zirconia, titania-alumina, and combinations of two or more thereof.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the second layer comprises a metal oxide selected from the group consisting of alumina, zirconia, silica, titania, silica-alumina, alumina-zirconia, titania- silica, titania-zirconia, titania-alumina, and combinations of two or more thereof.
- the metal oxide of the second layer comprises alumina, more preferably gamma alumina or activated alumina, such as gamma or eta alumina.
- the activated alumina has a specific surface area, determined according to BET surface area measurements, of from 60 to 300 m 2 /g, preferably from 90 to 200 m 2 /g, mostly preferred from 100 to 180 m 2 /g.
- the second layer has a ceria content of not more than 5 weight-%, preferably not more than 1 weight-%, more preferably not more than 0.1 weight-%.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the second layer has a ceria content of not more than 5 weight-%, preferably not more than 1 weight-%, more preferably not more than 0.1 weight-%.
- the palladium content of the first layer is concerned provided that the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the first layer comprises palladium in an amount of from 6 to 60 g/ft 3 .
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the first layer comprises palladium in an amount of from 6 to 60 g/ft 3 .
- the platinum content of the first layer is concerned provided that the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
- the first layer comprises platinum in an amount of from 15 to 40 g/ft 3 .
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the first layer comprises platinum in an amount of from 15 to 40 g/ft 3 .
- the second layer comprises platinum and palladium in a total amount of from 30 to 180 g/ft 3 .
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the second layer comprises platinum and palladium in a total amount of from 30 to 180 g/ft 3 .
- the diesel oxidation catalytic material comprises platinum and palladium in a total amount of from 30 to 240 g/ft 3 . Therefore, the present invention relates to the diesel oxidation catalyst as defined above, wherein the diesel oxidation catalytic material comprises platinum and palladium in a total amount of from 30 to 240 g/ft 3 .
- the second layer further comprises a hydrocarbon storage compound, preferably a zeolite.
- the second layer comprises the hydrocarbon storage compound in a total amount of from 0.1 to 1 g/ft 3 , preferably of from 0.3 to 0.8 g/ft 3 , more preferably in an amount of 0.5 g/ft 3 . Therefore, the present invention relates to the diesel oxidation catalyst as defined above, wherein the second layer further comprises a hydrocarbon storage compound, preferably a zeolite.
- any structure types of zeolites/aluminosilicates can be used, such as structure types of ABW, ACO, AEI, AEL, AEN, AET, AFG, AFI, AFN, AFO, AFR, AFS, AFT, AFX, AFY, AHT, ANA, APC, APD, AST, ASV, ATN, ATO, ATS, ATT, ATV, AWO, AWW, BCT, BEA, BEC, BIK, BOG, BPH, BRE, CAN, CAS, SCO, CFI, SGF, CGS, CHA, CHI, CLO, CON, CZP, DAC, DDR, DFO, DFT, DOH, DON, EAB, EDI, EMT, EON, EPI, ERI, ESV, ETR, EUO, FAU, FER, FRA, GIS, GIU, GME, GON, GOO, HEU, IFR, IHW, ISV,
- the zeolite can be a natural or synthetic zeolite such as faujasite, chabazite, clinoptilolite, mordenite, silicalite, zeolite X, zeolite Y, ultrastable zeolite Y, ZSM-5 zeolite, ZSM-12 zeolite, SSZ-3 zeolite, SAPO 5 zeolite, offretite, or a beta zeolite.
- Preferred zeolite materials have a high silica to alumina ratio.
- the zeolites may have a silica:alumina molar ratio of from at least 25:1 , preferably at least 50:1 , with useful ranges of from 25:1 to 1000:1 , 50:1 to 500:1 as well as 25:1 to 300:1 , from 100:1 to 250:1 , or alternatively from 35:1 to 180:1 is also exemplified.
- Preferred zeolites include ZSM, Y and beta zeolites.
- a particularly preferred beta zeolite is of the type disclosed in US 6,171 ,556.
- the zeolite can be present in its H-Form and/or its Na- Form. Further, the zeolite can be metal-doped.
- the diesel oxidation catalyst further comprises an undercoat layer located between the carrier substrate and the first layer, the undercoat layer preferably comprising alumina, more preferably gamma-alumina. Therefore, the present invention relates to the diesel oxidation catalyst as defined above further comprising an undercoat layer located between the carrier substrate and the first layer, the undercoat layer preferably comprising alumina, more preferably gamma-alumina.
- the carrier substrate may be a flow-through substrate or a wall flow substrate.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the carrier substrate is a flow-through substrate or a wall flow substrate.
- Wall flow substrates useful for the diesel oxidation catalysts of the present invention have a plurality of fine, substantially parallel flow passages extending along the longitudinal axis of the substrate. Each passage is blocked at one end of the substrate body, with alternate passages blocked at opposite end-faces.
- Such monolithic carriers may contain up to about 400 flow passages (or "cells") per square inch ((2.54 cm) 2 ) of cross section, although far fewer may be used.
- the carrier may have from 7 to 400, preferably from 100 to 400, cells per square inch (“cpsi").
- the cells can have cross sections that are rectangular, square, circular, oval, triangular, hexagonal, or are of other polygonal shapes.
- Preferred wall flow substrates are composed of ceramic-like materials such as cordierite, alpha-alumina, silicon carbide, silicon nitride, zirconia, mullite, spodumene, alumina-silica- magnesia or zirconium silicate, or of refractory metals such as stainless steel.
- Preferred wall flow substrates are formed from cordierite and silicon carbide. Such materials are able to withstand the environment, particularly high temperatures, encountered in treating the exhaust streams.
- Ceramic wall flow substrates are typically formed of a material having a porosity of about 40 to 70.
- porosity as used in this context is understood as being determined according to mercury porosity measurement according to DIN 66133. According to the present invention, wall flow substrates are preferred having a porosity in the range from 38 to 75.
- the carrier substrate comprises a material selected from the group consisting of cordierite, cordierite-alumina, silicon nitride, silicon carbide, zircon mullite, spodumene, alumina-silica magnesia, zircon silicate, sillimanite, magnesium silicate, zircon, petalite, alumina, alumosilicate and combinations of two or more thereof.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the carrier substrate comprises a material selected from the group consisting of cordierite, cordierite-alumina, silicon nitride, silicon carbide, zircon mullite, spodumene, alumina-silica magnesia, zircon silicate, sillimanite, magnesium silicate, zircon, petalite, alumina, alumosilicate and combinations of two or more thereof.
- the carrier substrate comprises a material selected from the group consisting of cordierite, cordierite-alumina, silicon nitride, silicon carbide, zircon mullite, spodumene, alumina-silica magnesia, zircon silicate, sillimanite, magnesium silicate, zircon, petalite, alumina, alumosilicate and combinations of two or more thereof.
- the carrier substrate comprises a material selected from the group consisting of cordierite, cordierite-alumina, silicon n
- a first layer located on the carrier substrate comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum; and b2) a second layer located on the first layer, the second layer comprising palladium and platinum each impregnated on a support material comprising a metal oxide;
- the layered diesel oxidation catalyst further comprises
- a third layer located on the second layer, the third layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum, wherein the platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- the present invention relates to the diesel oxidation catalyst as defined above, further comprising
- a third layer located on the second layer, the third layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum, wherein the platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- the platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- the ratio of the platinum to palladium weight ratio of the third layer to the platinum to palladium weight ratio of the second layer is lower than or equal to 0.9.
- the present invention also relates to the diesel oxidation catalyst as defined above, wherein the ratio of the platinum to palladium weight ratio of the third layer to the platinum to palladium weight ratio of the second layer is lower than or equal to 0.9.
- the third layer comprises palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material.
- the support material of the third layer comprises ceria in an amount of at least 65 weight-%, more preferably at least 85 weight-%, most preferably at least 95 weight-% based on the total weight of the support material. Therefore, the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the third layer comprises ceria in an amount of at least 65 weight-%, preferably at least 85 weight-%, more preferably at least 95 weight-% based on the total weight of the support material.
- the support material of the third layer further comprises zirconia and/or alumina.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the third layer further comprises zirconia and/or alumina.
- the support material of the third layer further comprises a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the support material of the third layer further comprises a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- a modifier selected from the group consisting of La 2 0 3 , Pr 6 On, Hf0 2 , Y 2 0 3 , Yb 2 0 3 , YbO, Nd 2 0 3 , NdO, W0 3 , Si0 2 , Ti0 2 and combinations of two or more thereof.
- the support material of the third layer comprises a ceria-zirconia material consisting of Ce0 2 : 45 wt%, Zr0 2 : 43.5 wt%, La 2 0 3 : 8 wt%, Pr 6 On: 2 wt%, and Hf0 2 : 1 .5 wt%.
- the third layer comprises palladium in an amount of from 2 to 30 g/ft 3 .
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the third layer comprises palladium in an amount of from 2 to 30 g/ft 3 .
- the platinum content of the third layer is concerned provided that the platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- the third layer comprises platinum in an amount of from 4 to 16 g/ft 3 .
- the present invention relates to the diesel oxidation catalyst as defined above, wherein the third layer comprises platinum in an amount of from 4 to 16 g/ft 3 .
- the third layer further comprises a hydrocarbon storage compound, preferably a zeolite. If present, the third layer comprises the hydrocarbon storage compound in a total amount of from 0.1 to 1 g/ft 3 , preferably of from 0.3 to 0.8 g/ft 3 , more preferably in an amount of 0.5 g/ft 3 . Therefore, the present invention relates to the diesel oxidation catalyst as defined above, wherein the third layer further comprises a hydrocarbon storage compound, preferably a zeolite.
- any structure types of zeolites/aluminosilicates can be used. In this respect, reference is made to the structure types mentioned for the second layer.
- the layered diesel oxidation catalyst of the present invention can be used in an integrated system for treating a gaseous exhaust stream of a diesel engine.
- the present invention also relates to the layered diesel oxidation catalyst as defined above comprised in a system for treating of a gaseous exhaust stream of a diesel engine, the system further comprising:
- a catalyzed soot filter CSF
- SCR selective catalytic reduction
- NSR NOx storage and reduction
- Each of the layers of the diesel catalytic material according to the present invention is formed from a washcoat composition that contains the respective support material as described above.
- Other additives such as binders and stabilizers can also be included in the washcoat composition.
- porous support materials such as activated alumina, can be thermally stabilized to retard undesirable alumina phase transformations from gamma to alpha at elevated temperatures.
- Stabilizers can be selected from at alkaline earth metal components selected from the group consisting of magnesium, barium, calcium and strontium, preferably strontium and barium. When present, stabilizer materials are added at from about 0.01 g/in 3 (g/(2.54 cm) 3 ) to 0.15 g/in 3 (g/(2.54 cm) 3 ) in the coating.
- the first layer is disposed on the surface of the carrier substrate or the undercoat layer.
- the second layer is disposed on the first layer which had been applied onto the surface of carrier substrate or the undercoat layer. Further, it is conceivable that a third layer is disposed on the second layer. It is to be understood that a given layer may partially permeate the substrate or the layer onto which it is applied.
- a suitable Pt and/or Pd component precursor for the preparation of the washcoat compositions mentioned above, it is preferred to disperse a suitable Pt and/or Pd component precursor on a suitable support material as described hereinabove. More preferably, a water-soluble or water-dispersible Pt and/or Pd component precursor is/are impregnated on a suitable support material, followed by drying and fixing steps.
- Suitable Pt and/or Pd component precursors include, for example, potassium platinum chloride, ammonium platinum thiocyanate, amine-solubilized platinum hydroxide, chloroplatinic acid, palladium nitrate, and the like. Other suitable precursors will be apparent to those of skill in the art.
- the impregnated support material is preferably dried with the Pt and/or Pd component fixed thereon.
- drying temperatures are in the range from 60 to 250 °C, preferably from 90 to 210 °C, more preferably from 100 to 150°C. Drying can be carried out in any suitable atmosphere, with N2 or air being preferred. After drying, it is preferred to finally fix the Pt and/or Pd component on the support material by suitable calcination and/or other suitable methods such as treatment with acetic acid. In general, any method resulting in the Pt and/or Pd component being in water-insoluble form is suitable. Generally, calcination temperatures are in the range from 250 to 800 °C, preferably from 350 to 700 °C, more preferably from 400 to 600 °C. Calcination can be carried out in any suitable atmosphere, with N2 or air being preferred.
- the catalytically active elemental Pt and/or Pd or the respective oxide is obtained.
- platinum or “palladium” present in the finally obtained layered diesel oxidation catalyst as used in the context of the present invention relates to the Pt and/or Pd component in the form of the catalytically active elemental Pt and/or Pd, or the oxide thereof, or the mixture of elemental Pt and/or Pd and the oxide thereof.
- the present invention also relates to a process for the preparation of the layered diesel oxidation catalyst as defined above, comprising the steps of
- platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer
- platinum to palladium weight ratio of the third layer is lower than the platinum to palladium weight ratio of the second layer.
- the present invention relates to a system for treating of a gaseous exhaust stream of a diesel engine, the system comprising:
- the layered diesel oxidation catalyst in fluid communication with the diesel engine via an exhaust manifold, the layered diesel oxidation catalyst as described above, wherein the carrier substrate is a wall-flow substrate or a flow through substrate, and one or more of the following in fluid communication with the layered diesel oxidation catalyst composite: a catalyzed soot filter (CSF), a selective catalytic reduction (SCR) article, a NOx storage and reduction (NSR) catalytic article.
- CSF catalyzed soot filter
- SCR selective catalytic reduction
- NSR NOx storage and reduction
- the layered diesel oxidation catalyst is located upstream of the catalyzed soot filter.
- the present invention relates to a system for treating a gaseous exhaust stream of a diesel engine as defined above comprising a catalyzed soot filter, wherein the layered diesel oxidation catalyst is located upstream of the catalyzed soot filter.
- a suitable SCR article for use in the exhaust conduit is typically able to catalyze the reaction of O2 with any excess NH3 to N 2 and H2O, so that NH3 is not emitted to the atmosphere.
- Suitable SCR articles are described, for instance, in US 4,961 ,917 and US 5,516,497.
- Suitable SCR articles include one or both of an iron and a copper promoter typically present in a zeolite in an amount of from about 0.1 to 30 percent by weight, preferably from about 1 to 5 percent by weight, of the total weight of promoter plus zeolite.
- Typical zeolites may exhibit a CHA framework structure.
- the present invention relates to a method of treating a gaseous exhaust stream of a diesel engine, said method comprising contacting the exhaust stream with the layered diesel oxidation catalyst as defined above.
- a Palladium nitrate solution was added to 0.75 g/in 3 high porous gamma-alumina resulting in 22 g/ft 3 Pd.
- the resulting frit was dispersed in water and acetic acid and milled to a particle size dgo of 25 micrometer.
- 0.75 g/in 3 of a material consisting of Zr0 2 : 43.5 wt%, Ce0 2 : 45 wt%, La 2 0 3 : 8 wt%, Pr 6 On : 2 wt%, and Hf0 2 : 1 .5% was dispersed and milled to a particle size dgo of 7 micrometer.
- the final slurry was coated onto a monolith, dried at 1 10°C in air and calcined at 450°C in air.
- 3 rd (top) layer 0.25g/in 3 of high porous gamma-alumina and 0.5 g/in 3 of a material consisting of Zr0 2 : 43.5 wt%, Ce0 2 : 45 wt%, La 2 0 3 : 8 wt%, Pr 6 On : 2 wt%, and Hf0 2 : 1 .5% were mixed and impregnated with an aqueous solution of Palladium nitrate giving a final dry Pd content of 8 g/ft 3 . Subsequently the impregnated material was dispersed in water and acetic acid and milled to a particle size dgo of 20 micrometer.
- H-beta zeolite 0.5g/in 3 H-beta zeolite was immersed in water to a solid content of 45%.
- the precious metal containing slurry was mixed with the H-beta zeolite containing slurry, milled to a particle size dgo of 15 ⁇ and subsequently coated onto the 2 nd layer, dried at 1 10°C in air and calcined at 450°C in air.
- Sample B For the 1 st (bottom) layer a Palladium nitrate solution was added to a mixture of high porous gamma-alumina (0.75 g/in 3 ) and 100% Ceria material (0.75 g/in 3 ) resulting in 36 g/ft 3 Pd. The resulting frit was dispersed in water and acetic acid and milled to a particle size dgo of 7 micrometer. The final slurry was coated onto a monolith, dried at 1 10°C in air and calcined at 450°C in air.
- the precious metal containing slurry was mixed with the H-beta zeolite containing slurry, milled to a particle size dgo of 15 ⁇ and subsequently coated onto the 2 nd layer, dried at 1 10°C in air and calcined at 450°C in air.
- a Palladium nitrate solution was added to a mixture of high porous gamma-alumina (0.75 g/in 3 ) and 100% Ceria material (0.75 g/in 3 ) resulting in 30 g/ft 3 Pd.
- the resulting frit was dispersed in water and acetic acid and milled to a particle size dgo of 7 micrometer.
- the final slurry was coated onto a monolith, dried at 1 10°C in air and calcined at 450°C in air.
- a Palladium nitrate solution was added to 0.75 g/in 3 high porous gamma-alumina resulting in 22 g/ft 3 Pd.
- the resulting frit was dispersed in water and acetic acid and milled to a particle size dgo of 25 micrometer.
- 0.75 g/in 3 high porous gamma-alumina was dispersed and milled to a particle size dgo of 7 micrometer.
- the final slurry was coated onto a monolith, dried at 1 10°C in air and calcined at 450°C in air.
- 3 rd (top) layer 0.75 g/in 3 high porous gamma-alumina was impregnated with an aqueous solution of Palladium nitrate giving a final dry Pd content of 8 g/ft 3 . Subsequently the impregnated material was dispersed in water and acetic acid and milled to a particle size dgo of 20 micrometer. 0.5g/in 3 H-beta zeolite was immersed in water to a solid content of 45%.
- the precious metal containing slurry was mixed with the H-beta zeolite containing slurry, milled to a particle size dgo of 15 ⁇ and subsequently coated onto the 2 nd layer, dried at 1 10°C in air and calcined at 450°C in air.
- Sample E not according to the invention
- 1 st (bottom) layer 1 g/in 3 high porous gamma-alumina was dispersed in water and acetic acid and milled to a particle size dgo of 15 micrometer.
- the final slurry was coated onto a monolith, dried at 1 10°C in air and calcined at 450°C in air.
- 3 rd (top) layer 0.25g/in 3 high porous gamma-alumina was dispersed in water and acetic acid and milled to a particle size dgo of 20 micrometer.
- 0.5g/in 3 H-beta zeolite was immersed in water to a solid content of 45%.
- a platinum precursor solution with platinum as an ammine stabilized hydroxo Pt IV complex was added to give a Pt content of 8g/ft 3 .
- the precious metal containing slurry was mixed with the alumina containing slurry, milled to a particle size dgo of 15 ⁇ and subsequently coated onto the 2 nd layer, dried at 1 10°C in air and calcined at 450°C in air.
- 2 nd Layer 60 g/ft 3 Pt, 30 g/ft 3 Pd, 1 .5 g/in 3 high porous gamma-alumina
- 3 rd Layer 8 g/ft 3 Pd, 0.25 g/in 3 high porous gamma-alumina, 0.5 g/in 3 H-Beta zeolite, 0.5 g/in 3 (Zr0 2 : 43.5 wt%, Ce0 2 : 45 wt%, La 2 0 3 : 8 wt%, Pr 6 On: 2 wt%, and Hf0 2 : 1 .5%)
- 2 nd Layer 52 g/ft 3 Pt, 26 g/ft 3 Pd, 1 .5 g/in 3 high porous gamma-alumina
- 3 rd Layer 16/ft 3 Pd, 0.25 g/in 3 high porous gamma-alumina, 0.5 g/in 3 H-Beta zeolite, 0.5 g/in 3 100% Ceria
- 2 nd Layer 60 g/ft 3 Pt, 30 g/ft 3 Pd, 1 g/in 3 high porous gamma-alumina 0.5 g/in 3 H-Beta zeolite
- 2 nd Layer 60 g/ft 3 Pt, 30 g/ft 3 Pd, 1 .5 g/in 3 high porous gamma-alumina
- 3 rd Layer 8 g/ft 3 Pd, 0.75 g/in 3 high porous gamma-alumina, 0.5 g/in 3 H-Beta zeolite
- 2 nd Layer 72 g/ft 3 Pt, 40 g/ft 3 Pd, 1 .5 g/in 3 high porous gamma-alumina
- 3 rd Layer 8 g/ft 3 Pt, 0.25 g/in 3 high porous gamma-alumina, 0.5 g/in 3 H-Beta zeolite
- each sample was placed downstream in the exhaust line of a 6 cylinder light duty diesel engine with a 3 L engine displacement.
- the CO and HC concentration in the exhaust stream was constant at 1500 ppm and 300 ppm (C3 basis), respectively.
- the gas flow under standard conditions was around 60 m 3 /h.
- the temperature ramp was 40°C/min.
- a lower light-off temperature characterizes a better gas activity.
- Samples A), B), C), D) and E show higher HC conversion at lower temperatures compared to Samples D) and E) not according to the invention.
- Sample C) according to the invention shows a lower light-off temperature at around 70% HC conversion compared to Samples D) and E) not according to the invention.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280057507.XA CN103945936B (zh) | 2011-09-23 | 2012-09-21 | 用于增强hc和co气体转化的具有包含二氧化铈组合物作为钯承载材料的层状结构的柴油机氧化催化剂 |
EP12833838.1A EP2758168B2 (en) | 2011-09-23 | 2012-09-21 | Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion |
MX2014003469A MX368239B (es) | 2011-09-23 | 2012-09-21 | Catalizador para la oxidación de diésel, con estructura estratificada que contiene una composición de cerio como material de soporte de paladio para mejorar la conversión de gas hc y co. |
PL12833838T PL2758168T3 (pl) | 2011-09-23 | 2012-09-21 | Katalizator utleniania dla silnika wysokoprężnego o strukturze warstwowej zawierający kompozycję tlenku ceru jako palladowy materiał nośnikowy dla zwiększenia konwersji hc i co |
IN2204CHN2014 IN2014CN02204A (ja) | 2011-09-23 | 2012-09-21 | |
KR1020147010520A KR102064620B1 (ko) | 2011-09-23 | 2012-09-21 | Hc 및 co 가스 전환율을 향상시키기 위한, 팔라듐 지지체 물질로서 세리아 조성물을 함유하는 층상 구조를 갖는 디젤 산화 촉매 |
JP2014531362A JP6236389B2 (ja) | 2011-09-23 | 2012-09-21 | パラジウム支持体材料としてセリア組成物を含む層状構造を有する高hcガス変換率及び高coガス変換率のディーゼル酸化触媒 |
CA2849700A CA2849700C (en) | 2011-09-23 | 2012-09-21 | Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion |
BR112014006900A BR112014006900B8 (pt) | 2011-09-23 | 2012-09-21 | catalisador e compósito de catalisador de oxidação de diesel em camadas, uso e processo para preparação do mesmo e sistema para tratar uma corrente de escape gasoso de um motor a diesel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11182585.7 | 2011-09-23 | ||
EP11182585 | 2011-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013042080A1 true WO2013042080A1 (en) | 2013-03-28 |
Family
ID=47913964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2012/055030 WO2013042080A1 (en) | 2011-09-23 | 2012-09-21 | Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP2758168B2 (ja) |
JP (1) | JP6236389B2 (ja) |
KR (1) | KR102064620B1 (ja) |
CN (1) | CN103945936B (ja) |
BR (1) | BR112014006900B8 (ja) |
CA (1) | CA2849700C (ja) |
IN (1) | IN2014CN02204A (ja) |
MX (1) | MX368239B (ja) |
PL (1) | PL2758168T3 (ja) |
WO (1) | WO2013042080A1 (ja) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2495404A (en) * | 2011-10-06 | 2013-04-10 | Johnson Matthey Plc | Oxidation catalyst for internal combustion engine exhaust gas treatment |
GB2514177A (en) * | 2013-05-17 | 2014-11-19 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
WO2015121248A1 (en) * | 2014-02-11 | 2015-08-20 | Basf Se | Process of treating diesel exhaust gas using ceria-zirconia-mixed oxide particles produced by pyrolysis |
WO2016141142A1 (en) * | 2015-03-03 | 2016-09-09 | Basf Corporation | LEAN NOx TRAP WITH ENHANCED HIGH AND LOW TEMPERATURE PERFORMANCE |
WO2016175697A1 (en) * | 2015-04-29 | 2016-11-03 | Scania Cv Ab | Exhaust gas treatment system |
GB2559853A (en) * | 2016-12-15 | 2018-08-22 | Johnson Matthey Plc | NOx adsorber Catalyst |
WO2018167055A1 (en) | 2017-03-14 | 2018-09-20 | Basf Corporation | Pt/pd doc with enhanced co oxidation, hydrocarbon oxidation and no oxidation and improved sulfation/desulfation behavior |
US10335770B2 (en) | 2017-06-15 | 2019-07-02 | Ford Global Technologies, Llc | Method and system for diesel oxidation catalysts |
EP3597287A1 (en) * | 2014-04-01 | 2020-01-22 | Johnson Matthey Public Limited Company | Diesel oxidation catalyst with nox adsorber activity |
CN111715204A (zh) * | 2020-06-11 | 2020-09-29 | 华北电力大学 | 高温烟气用平板式scr脱硝催化剂及其制备方法 |
EP3815780A1 (en) | 2019-10-30 | 2021-05-05 | Umicore Ag & Co. Kg | Diesel oxidation catalyst |
EP3865209A1 (en) | 2020-02-17 | 2021-08-18 | UMICORE AG & Co. KG | Diesel oxidation catalyst |
US11248505B2 (en) | 2016-06-17 | 2022-02-15 | Basf Corporation | Palladium diesel oxidation catalyst |
CN114945422A (zh) * | 2019-12-13 | 2022-08-26 | 巴斯夫公司 | 复合物中Cu和Pd共交换的沸石 |
EP3966440A4 (en) * | 2019-05-09 | 2023-04-19 | BASF Corporation | LOW TEMPERATURE NOX ADSORBER WITH ENHANCED HYDROTHERMAL STABILITY |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5954159B2 (ja) * | 2012-12-18 | 2016-07-20 | マツダ株式会社 | 触媒付パティキュレートフィルタ |
CA2978703A1 (en) * | 2015-03-03 | 2016-09-09 | Basf Corporation | Nox adsorber catalyst, methods and systems |
DE102016207484A1 (de) * | 2016-05-02 | 2017-11-02 | Umicore Ag & Co. Kg | Dieseloxidationskatalysator |
WO2017205042A2 (en) * | 2016-05-26 | 2017-11-30 | Basf Corporation | Core/shell catalyst particles and method of manufacture |
EP3487617B1 (de) * | 2016-07-19 | 2021-09-08 | Umicore AG & Co. KG | Dieseloxidationskatalysator |
KR102494737B1 (ko) * | 2016-12-05 | 2023-02-02 | 바스프 코포레이션 | NO의 산화, 탄화수소의 산화, NH₃의 산화 및 NOx의 선택적 접촉 환원을 위한 4-작용성 촉매 |
JP7202051B2 (ja) * | 2017-06-09 | 2023-01-11 | ビーエーエスエフ コーポレーション | 触媒物品および排気ガス処理システム |
CN108940270B (zh) * | 2018-06-19 | 2021-03-16 | 天津大学 | 一种钯-氧化铝-堇青石复合材料及其制备方法和用途 |
CN108569861A (zh) * | 2018-07-05 | 2018-09-25 | 安徽思凯瑞环保科技有限公司 | 抗潮解的粗钛粉及其制备方法 |
WO2020115318A1 (en) * | 2018-12-06 | 2020-06-11 | Basf Se | Aqueous suspension comprising a zeolitic material and a zirconium chelate complex |
CN110252313A (zh) * | 2019-06-20 | 2019-09-20 | 武汉科林精细化工有限公司 | 一种宽温干法烟气脱硝剂及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02265648A (ja) * | 1989-04-04 | 1990-10-30 | Nissan Motor Co Ltd | 排ガス浄化用触媒 |
WO1993010885A1 (en) * | 1991-11-26 | 1993-06-10 | Engelhard Corporation | Oxidation catalyst and method of use |
CN1277892A (zh) * | 2000-06-21 | 2000-12-27 | 中国科学院兰州化学物理研究所 | 用于净化废气的催化剂 |
EP1985352A2 (en) * | 2007-04-27 | 2008-10-29 | Ngk Insulators, Ltd. | Honeycomb filter system |
WO2010077843A2 (en) * | 2008-12-29 | 2010-07-08 | Basf Catalysts Llc | Oxidation catalyst with low co and hc light-off and systems and methods |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW442324B (en) * | 1996-12-06 | 2001-06-23 | Engelhard Corp | Catalytic metal plate |
US7576031B2 (en) | 2006-06-09 | 2009-08-18 | Basf Catalysts Llc | Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function |
GB0620883D0 (en) | 2006-10-20 | 2006-11-29 | Johnson Matthey Plc | Exhaust system for a lean-burn internal combustion engine |
US7754171B2 (en) * | 2007-02-02 | 2010-07-13 | Basf Corporation | Multilayered catalyst compositions |
TR200805170A2 (tr) † | 2008-07-12 | 2009-07-21 | K.E.T Kauçuk Ekstrüzyon Teknoloji̇si̇ Sanayi̇ Ti̇caret Li̇mi̇ted Şi̇rketi̇ | Sızdırmazlık Fitili Üretimi İçin Yeni Bir Sistem |
US8211392B2 (en) * | 2009-01-16 | 2012-07-03 | Basf Corporation | Diesel oxidation catalyst composite with layer structure for carbon monoxide and hydrocarbon conversion |
US9440192B2 (en) * | 2009-01-16 | 2016-09-13 | Basf Corporation | Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems |
JP5519181B2 (ja) * | 2009-05-13 | 2014-06-11 | 本田技研工業株式会社 | 内燃機関の排気浄化装置 |
US8668877B2 (en) | 2010-11-24 | 2014-03-11 | Basf Corporation | Diesel oxidation catalyst articles and methods of making and using |
-
2012
- 2012-09-21 EP EP12833838.1A patent/EP2758168B2/en active Active
- 2012-09-21 MX MX2014003469A patent/MX368239B/es active IP Right Grant
- 2012-09-21 KR KR1020147010520A patent/KR102064620B1/ko active IP Right Grant
- 2012-09-21 IN IN2204CHN2014 patent/IN2014CN02204A/en unknown
- 2012-09-21 WO PCT/IB2012/055030 patent/WO2013042080A1/en active Application Filing
- 2012-09-21 PL PL12833838T patent/PL2758168T3/pl unknown
- 2012-09-21 CN CN201280057507.XA patent/CN103945936B/zh active Active
- 2012-09-21 BR BR112014006900A patent/BR112014006900B8/pt not_active IP Right Cessation
- 2012-09-21 JP JP2014531362A patent/JP6236389B2/ja active Active
- 2012-09-21 CA CA2849700A patent/CA2849700C/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02265648A (ja) * | 1989-04-04 | 1990-10-30 | Nissan Motor Co Ltd | 排ガス浄化用触媒 |
WO1993010885A1 (en) * | 1991-11-26 | 1993-06-10 | Engelhard Corporation | Oxidation catalyst and method of use |
CN1277892A (zh) * | 2000-06-21 | 2000-12-27 | 中国科学院兰州化学物理研究所 | 用于净化废气的催化剂 |
EP1985352A2 (en) * | 2007-04-27 | 2008-10-29 | Ngk Insulators, Ltd. | Honeycomb filter system |
WO2010077843A2 (en) * | 2008-12-29 | 2010-07-08 | Basf Catalysts Llc | Oxidation catalyst with low co and hc light-off and systems and methods |
Non-Patent Citations (1)
Title |
---|
See also references of EP2758168A4 * |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9005559B2 (en) | 2011-10-06 | 2015-04-14 | Johnson Matthey Public Limited Company | Oxidation catalyst for internal combustion engine exhaust gas treatment |
US9868115B2 (en) | 2011-10-06 | 2018-01-16 | Johnson Matthey Public Limited Company | Oxidation catalyst for internal combustion engine exhaust gas treatment |
GB2495404A (en) * | 2011-10-06 | 2013-04-10 | Johnson Matthey Plc | Oxidation catalyst for internal combustion engine exhaust gas treatment |
GB2540484A (en) * | 2013-05-17 | 2017-01-18 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
GB2530617B (en) * | 2013-05-17 | 2017-05-17 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
CN105209171A (zh) * | 2013-05-17 | 2015-12-30 | 庄信万丰股份有限公司 | 用于压燃发动机的氧化催化剂 |
GB2530617A (en) * | 2013-05-17 | 2016-03-30 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
CN105209171B (zh) * | 2013-05-17 | 2019-06-28 | 庄信万丰股份有限公司 | 用于压燃发动机的氧化催化剂 |
GB2515893A (en) * | 2013-05-17 | 2015-01-07 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
GB2540485A (en) * | 2013-05-17 | 2017-01-18 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
US11794169B2 (en) | 2013-05-17 | 2023-10-24 | Johnson Matthey Public Limited Company | Oxidation catalyst for a compression ignition engine |
US9643161B2 (en) | 2013-05-17 | 2017-05-09 | Johnson Matthey Public Limited Company | Oxidation catalyst for a compression ignition engine |
GB2514177A (en) * | 2013-05-17 | 2014-11-19 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
GB2515893B (en) * | 2013-05-17 | 2017-07-26 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
GB2540485B (en) * | 2013-05-17 | 2017-12-27 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
GB2540484B (en) * | 2013-05-17 | 2017-12-27 | Johnson Matthey Plc | Oxidation catalyst for a compression ignition engine |
WO2015121248A1 (en) * | 2014-02-11 | 2015-08-20 | Basf Se | Process of treating diesel exhaust gas using ceria-zirconia-mixed oxide particles produced by pyrolysis |
EP3597287A1 (en) * | 2014-04-01 | 2020-01-22 | Johnson Matthey Public Limited Company | Diesel oxidation catalyst with nox adsorber activity |
RU2708854C2 (ru) * | 2015-03-03 | 2019-12-11 | Басф Корпорейшн | КАТАЛИЗАТОР-ЛОВУШКА NOx В УСЛОВИЯХ ОБЕДНЕННОЙ СМЕСИ С УЛУЧШЕННЫМИ ХАРАКТЕРИСТИКАМИ ПРИ ВЫСОКИХ И НИЗКИХ ТЕМПЕРАТУРАХ |
US10226754B2 (en) | 2015-03-03 | 2019-03-12 | Basf Corporation | Lean NOx trap with enhanced high and low temperature performance |
WO2016141142A1 (en) * | 2015-03-03 | 2016-09-09 | Basf Corporation | LEAN NOx TRAP WITH ENHANCED HIGH AND LOW TEMPERATURE PERFORMANCE |
WO2016175697A1 (en) * | 2015-04-29 | 2016-11-03 | Scania Cv Ab | Exhaust gas treatment system |
US11248505B2 (en) | 2016-06-17 | 2022-02-15 | Basf Corporation | Palladium diesel oxidation catalyst |
GB2559853A (en) * | 2016-12-15 | 2018-08-22 | Johnson Matthey Plc | NOx adsorber Catalyst |
GB2559853B (en) * | 2016-12-15 | 2021-03-31 | Johnson Matthey Plc | Lean NOx trap catalyst and use thereof |
WO2018167055A1 (en) | 2017-03-14 | 2018-09-20 | Basf Corporation | Pt/pd doc with enhanced co oxidation, hydrocarbon oxidation and no oxidation and improved sulfation/desulfation behavior |
US10724411B2 (en) | 2017-03-14 | 2020-07-28 | Basf Corporation | Pt/Pd doc with enhanced CO oxidation, hydrocarbon oxidation and NO oxidation and improved sulfation/desulfation behavior |
US10335770B2 (en) | 2017-06-15 | 2019-07-02 | Ford Global Technologies, Llc | Method and system for diesel oxidation catalysts |
EP3966440A4 (en) * | 2019-05-09 | 2023-04-19 | BASF Corporation | LOW TEMPERATURE NOX ADSORBER WITH ENHANCED HYDROTHERMAL STABILITY |
WO2021084054A1 (en) | 2019-10-30 | 2021-05-06 | Umicore Ag & Co. Kg | Diesel oxidation catalyst |
EP3815780A1 (en) | 2019-10-30 | 2021-05-05 | Umicore Ag & Co. Kg | Diesel oxidation catalyst |
CN114945422A (zh) * | 2019-12-13 | 2022-08-26 | 巴斯夫公司 | 复合物中Cu和Pd共交换的沸石 |
WO2021165280A1 (en) | 2020-02-17 | 2021-08-26 | Umicore Ag & Co. Kg | Diesel oxidation catalyst |
EP3865209A1 (en) | 2020-02-17 | 2021-08-18 | UMICORE AG & Co. KG | Diesel oxidation catalyst |
CN111715204A (zh) * | 2020-06-11 | 2020-09-29 | 华北电力大学 | 高温烟气用平板式scr脱硝催化剂及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
PL2758168T3 (pl) | 2020-02-28 |
JP2014527909A (ja) | 2014-10-23 |
JP6236389B2 (ja) | 2017-11-22 |
CN103945936A (zh) | 2014-07-23 |
KR20140073533A (ko) | 2014-06-16 |
CA2849700C (en) | 2020-02-18 |
EP2758168A4 (en) | 2015-12-02 |
KR102064620B1 (ko) | 2020-01-09 |
EP2758168B2 (en) | 2022-11-16 |
EP2758168B1 (en) | 2019-07-31 |
CN103945936B (zh) | 2016-11-16 |
BR112014006900B1 (pt) | 2019-08-20 |
MX368239B (es) | 2019-09-25 |
EP2758168A1 (en) | 2014-07-30 |
IN2014CN02204A (ja) | 2015-06-12 |
BR112014006900A2 (pt) | 2017-04-11 |
CA2849700A1 (en) | 2013-03-28 |
BR112014006900B8 (pt) | 2019-10-15 |
MX2014003469A (es) | 2014-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9044734B2 (en) | Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced HC and CO gas conversion | |
EP2758168B1 (en) | Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced hc and co gas conversion | |
US11896962B2 (en) | Manganese-containing diesel oxidation catalyst | |
US20200346192A1 (en) | Diesel oxidation catalyst | |
KR102602376B1 (ko) | 디젤 산화 촉매 | |
US20190262809A1 (en) | Manganese-Containing Diesel Oxidation Catalyst | |
EP2707118B1 (en) | Catalyzed soot filter with layered design | |
US9034269B2 (en) | Diesel oxidation catalyst comprising palladium, gold and ceria | |
US8524182B2 (en) | Catalyzed soot filter with layered design |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12833838 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014531362 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2849700 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2014/003469 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012833838 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20147010520 Country of ref document: KR Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014006900 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112014006900 Country of ref document: BR Kind code of ref document: A2 Effective date: 20140321 |